參數(shù)資料
型號: BT849A
英文描述: Single-Chip Video Capture for PCI
中文描述: 單芯片的PCI視頻捕捉
文件頁數(shù): 93/141頁
文件大?。?/td> 1149K
代理商: BT849A
Brooktree
83
L848A_A
C
ONTROL
R
EGISTER
D
EFINITIONS
Bt848 supports two types of address spaces. The configuration address space in-
cludes the pre-defined PCI configuration registers, while the memory address
space includes all the local registers used by Bt848 to control the remaining por-
tions of the device. Both the PCI configuration address space and the memory ad-
dress space start at memory location 0x00. The PCI-based system distinguishes the
two address spaces based on the Initialization Device Select, PCI address and com-
mand signals that are issued during the appropriate software commands.
PCI Configuration Space
The PCI configuration space defines the registers used to interface between the
host and the PCI local bus. This section defines the organization of the registers
within the 64 byte predefined header portion of the configuration space. Figure 41
shows the configuration space header. For details on the PCI bus, refer to the
PCI
Local Bus Specification, Revision 2.1
.
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